*{
    padding: o;
    margin: 0;
    box-sizing: border-box;
}
input{
    outline: none;
}
html,
body{
    height: 100%;
}
body {
    margin: 0 auto;
    font-size: 14px;
    color: #88888888;
    position: relative;
}
::-webkit-scrollbar{
    display: none;
}
.clearfix:after{/*伪元素是行内元素 正常浏览器清除浮动方法*/
    content: "";
    display: block;
    height: 0;
    clear:both;
    visibility: hidden;
}
.clearfix{
    *zoom: 1;/*ie6清除浮动的方式 *号只有IE6-IE7执行，其他浏览器不执行*/
}
img{
    border: none;
}
a {
    cursor: pointer;
    color: #000;
    text-decoration: none;
    outline: none;
}
ul {
    list-style-type: none;
}
/* 去除列表前面的点 */
li {
    list-style: none;
}
.nav li:nth-child(5) a{
    color: bisque;
}
em { 
    font-style: normal;
}
/* 导航条 */
header {
    background-color: #000;
    height: 50px;
}
.nav {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 !important;
}
.nav li {
    float: left;
    padding-left: 50px;
    padding-right: 50px;
}

.nav li a {
    color: white;
    font-size: 25px;
    line-height: 50px;
}
/* 鼠标经过变色 */
.nav li a:hover {
    color: bisque;
}
.banner {
    margin: 0 auto;
    width: 99vw;
    height: 650px;
}
.banner img {
    width: 100%;
    height: 100%;
}
.title h2 {
    text-align: center;
}

main{
    position: relative;
    overflow-x: hidden;
    display: flex;
    background: linear-gradient(to right, rgb(247, 209, 215), rgb(191, 227, 241));
}

span{
    position: absolute;
    bottom: 0;
    background: radial-gradient(circle at 72% 28%, #fff 3px, #ff7edf 8%, #5b5b5b, #aad7f9 100%);
    box-shadow: inset 0 0 6px #fff,
                inset 3px 0 6px #eaf5fc,
                inset 2px -2px 10px #efcde6,
                inset 0 0 60px #f9f6de,
                0 0 20px #fff;
    border-radius: 50%;
    z-index: 0;
    animation: mymove 4s linear infinite;
}
@keyframes mymove {
    0%{
        transform: translateY(0%);
        opacity: 1;
    }
    50%{
        transform: translate(10%,-1000%);
    }
    75%{
        transform: translate(-20%,-1200%);
    }
    99%{
        opacity: .9;
    }
    100%{
        transform: translateY(-1800%) scale(1.5);
        opacity: 0;
    }
}
.box{
    width: 1050px;
    height: 600px;
    display: flex;
    position: relative;
    z-index: 2;
    /* background-color: #fff; */
    margin: auto;
    border-radius: 8px;
    border: 1px solid rgb(255, 255, 255, .6);
    box-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
}
.pre-box{
    width: calc(1050px /2);
    height: 100%;
    left: 0;
    top: 0;
    position: absolute;
    border-radius: 4px;
    background-color: #edd4dc;
    box-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
    transition: 0.5s ease-in-out;
}
.pre-box h1{
    margin-top: 150px;
    text-align: center;
    color: white;
    letter-spacing: 5px;
    text-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
}
.pre-box p{
    height: 30px;
    line-height: 30px;
    text-align: center;
    color: white;
    margin: 20px 0;
    font-weight: bold;
    text-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
}
.img-box{
    width: 200px;
    height: 200px;
    margin: 20px auto;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
}
.img-box img{
    width: 100%;
    transition: 0.5s;
}
.login-form,
.register-form{
    flex: 1;
    height: 100%;
}
.title-box{
    height: 300px;
    line-height: 500px;
}
.title-box h1{
    text-align: center;
    color: white;
    letter-spacing: 5px;
    text-shadow: 4px 4px 3px rgb(0, 0, 0, .1);
}
.input-box{
    display: flex;
    flex-direction: column;
    align-items: center;
}
input{
    width: 60%;
    height: 40px;
    margin-bottom: 20px;
    text-indent: 4px;
    border: 1px solid #b0cfe9;
    border-radius: 4px;
}
input:focus{
    color: #b0cfe9;
}
input:focus::placeholder{
    opacity: 0;
}
.btn-box{
    display: flex;
    justify-content: center;
}
button{
    width: 100px;
    height: 30px;
    margin: 0 7px;
    line-height: 30px;
    border-radius: 4px;
    border: none;
    background-color: #69b3f0;
    color: #fff;
}
button:hover{
    cursor: pointer;
    opacity: .8;
}
.btn-box p{
    height: 30px;
    line-height: 30px;
    font-size: 14px;
    color: white;
}
.btn-box p:hover{
    cursor: pointer;
    border-bottom: 1px solid white;
}